— Eleanor Roosevelt American politician, diplomat, and activist, and First Lady of the United States 1884 - 1962Another quote often attributed to her without an original source in her writings, as in The Wit and Wisdom of Eleanor Roosevelt (1996), p. 199. But once again archivists have not been able to find the quote in any of her writings, see the comment from Ralph Keyes in The Quote Verifier above.
A very similar remark was attributed to Nancy Reagan, in The Observer (29 March 1981): "A woman is like a teabag — only in hot water do you realize how strong she is."
Variants:
A woman is like a teabag. You never know how strong she is until she gets into hot water.
A woman is like a tea bag, you can not tell how strong she is until you put her in hot water.
A woman is like a tea bag; you can't tell how strong she is and how much to trust her until you put her in hot water.

— Adolf Hitler Führer and Reich Chancellor of Germany, Leader of the Nazi Party 1889 - 1945Context: Since we are socialists, we must necessarily also be antisemites because we want to fight against the very opposite: materialism and mammonism… How can you not be an antisemite, being a socialist!
"Why We Are Anti-Semites," August 15, 1920 speech in Munich at the Hofbräuhaus. Translated from Vierteljahrshefte für Zeitgeschichte, 16. Jahrg., 4. H. (Oct., 1968), pp. 390-420. Edited by Carolyn Yeager. [https://carolynyeager.net/why-we-are-antisemites-text-adolf-hitlers-1920-speech-hofbr%C3%A4uhaus]